Yes, today is the first Monday of the month, but we're since we're doing this month's Mobile Monday in conjunction with the SDForum, it's going to be held next week on Google's campus. You can get all the details from Mike's Mobile Monday post on the meetup, but here's a relevant bit here:

We are asking for folks to pre-register this time so that we can get a feel for the size of the group. There are enough of us now that logistics can be tricky. The lineup looks fantastic!